JPH0654206A - Image communication equipment - Google Patents

Abstract

PURPOSE:To provide an image communication equipment at the low cost to receive and record an accurate answer to a Q command. CONSTITUTION:Received coded data are decoded by a decoding means 5a for each prescribed quantity, and the transmission errors are checked for each line based on these decoded data. Then the decoded data on the lines except those having the errors are coded and stored in a reception memory 4b. These data stored in the memory 4b are decoded by the soft processing of a microprocessor 12 and then transmitted to an ink jet recording part 1 as the recording data after the conversion of image resolution and the vertical/ horizontal conversion. The microprocessor 12 has a function to control the operation of the means 5a and performs the decoding processing of the means 5a and the transmission error check processing in preference to the decoding processing which uses the soft processing for generation of the recording data.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an image communication device.

[0002]

2. Description of the Related Art A facsimile apparatus receives an image signal normally in response to a Q command when the number of errors is less than a predetermined number, for example, by counting the number of error lines on each page when receiving one page. If the MCF indicating that the next original can be received immediately is a predetermined number or more, the image signal was normally received in response to the Q command, but training is required again to receive the next original. Indicates that the RTP or the image signal has not been normally received, and the RTN indicating that the training is required again for the reception of the next original must be returned within a predetermined time.

Conventionally, a printer using a thermal head has been the mainstream as a recording apparatus for a facsimile. Such a thermal printer is generally a line printer that has a thermal head having a recording width for one line and records in one line unit, and the time required to record one line is one line. Since it is possible to use a transmission time smaller than the minimum transmission time, it is possible to immediately record the decoded data. Therefore, there is no problem in the timing of the response to the Q command.

[0004]

On the other hand, a laser beam printer (hereinafter referred to as LBP) is generally used as a recording apparatus for plain paper facsimiles. The LPB is a page printer that prints on a page-by-page basis because of the characteristics of the printing system. Since the printing time is constant regardless of the amount of information on one page, printing starts after the consultation for one page and Since a recording time is required, a receiving page memory capable of storing code data of a plurality of pages is essential for the system. Further, in order to ensure real-time property by recording while receiving a response to the Q command, a first decoding means for counting error lines and a second decoding means for decoding received data for recording are provided. I need. Further, even in a system that keeps the cost low, the two decoding means are currently processing in real time using dedicated expensive logic circuits.

Further, there is an ink jet system as a plain paper recording system, but this is generally a block printer for collectively recording several lines, and the recording speed is generally slower than the above two systems. Therefore, when this inkjet method is used as a printer for a facsimile, it is necessary to use two decoding means as in the case of the LBP in order to make a system that surely responds to the Q command and records while receiving.

The present invention has been made in view of the above points,
The purpose is to realize a reliable response to a Q command and an image communication apparatus capable of recording while receiving, at low cost.

[0007]

That is, according to the present invention, a receiving means for receiving coded data, a decoding process for the coded data received by the receiving means, and a line based on the decoded data are provided. Decoding means for performing transmission error detection processing for each, and controlling the operation of the decoding means, for decoding the encoded data except for the encoded data of the line in which the transmission error has occurred, for generating the recording data. And a recording means for recording an image on a recording material based on the data decoded by the control means, and the decoding and transmission error detection processing by the decoding means and the decoding processing by the control means are performed in parallel. In addition to the above, the control means causes the operation of the decoding means to be executed prior to the decoding processing for generating the recording data.

As a result, the control means for controlling the operation of the decoding means for performing the decoding processing for the transmission error check performs the decoding processing for generating the recording data. Then, the decoding processing by the decoding means and the detection processing of the transmission error and the decoding processing for generating the recording data are performed in parallel with each other.

[0009]

An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is an external perspective view of a facsimile apparatus according to the present invention. In the figure, the main body 1 of the facsimile apparatus is a facsimile apparatus including an inkjet recording unit of a serial recording system described later.

This facsimile machine, as shown in the figure,
The operation panel 20 is provided on the front edge of the upper surface 201b of the main body 201.
Two are provided. Further, on the lower rear side of the operation panel 202, a document table 204 having a lid portion 204b which can be freely opened and closed.
Is provided, and after a plurality of originals are accommodated on the original table 104, the original width is adjusted by the guides 204a, and then the originals are moved in the direction of arrow A one by one to the front side surface 201a of the main body 201. A document reading unit, which will be described later, is provided for reading the document while ejecting the document into the opening 203 provided.

A serial recording type ink jet recording apparatus, which will be described later, is provided below the document reading section.
The sheet placing table 206 for supplying the sheet is detachably attached to the main body 1 in an oblique direction, and the recording sheet S sent from the sheet placing table 206 in the direction of arrow B1 for each sheet is recorded in the main body after the image data is recorded. It is discharged in the direction of arrow B2 from a discharge port 207 provided on the front surface 201a of 201.
It is also possible to perform recording on a recording paper which is manually fed and sent in the direction of arrow C or D in the figure.

Next, FIG. 2 is a main cross-sectional view of FIG. 1, showing main components of the respective built-in constituent elements. In this figure, the upper surface 20 of the main body 201 indicated by the alternate long and short dash line in the figure
An operation panel 202 is provided at the front edge of 1b, and a key 202a and a display 202b mounted on a substrate 202c are exposed to the outside from a hole formed integrally with the operation panel 202.

On the other hand, on the lower left side of the operation panel 202, a document E shown in the figure is moved in the direction of arrow A by a one-dot chain line to move the main body 2
A document reading unit for reading a document while ejecting the document E is provided in an opening 203 provided on the side surface 201a in front of 01.

The structure of this document reading unit is such that a contact sensor 208 for directly contacting the document surface of the document E for reading.
And a feed roller 209 which is rotated in a pressed state with respect to the reading unit of the contact sensor 208. Further, a separation piece 210 and a separation feed roller 211 are provided further upstream of the contact sensor 208 in order to send out a plurality of documents that can be placed on the document table 204 one by one to the contact sensor 208 side.

On the other hand, in the serial recording type ink jet recording apparatus, the carriage 213 is provided substantially vertically as shown in the figure, and the ink jet recording section is directed downward, and the arrow is drawn from the sheet table 206 for each sheet. B1
It is configured so that the recording sheet S fed in the direction is not unduly deformed. Here, the seat stand 2
If a sheet cartridge is provided instead of 06,
By being provided so as to be insertable and removable in the direction of arrow C in the figure, the deformation during sheet conveyance can be further reduced.

As this ink jet recording apparatus, an ink jet recording apparatus in which thermal energy is used to cause a change in the state of ink to eject ink droplets is preferably applied as the ink jet recording apparatus. A well-known ink jet recording device may be used.

Next, the construction of this ink jet recording apparatus is such that a carriage 213 is slidable by guide shafts 214a and 214b for being reciprocally driven by a driving mechanism (not shown) in the front and back directions of the paper surface, and this carriage 213. A recording scan for recording and scanning in the lateral direction of the recording paper by an ink cartridge 212 integrated with the recording head and a platen 215 that is fixed to the main body 101 side and serves as a fixing base for the recording paper during recording. Consists of parts.

On the other hand, even if the rubber roller 217 driven by a drive unit (not shown) provided on the main body, the pressure contact piece 216, the sheet guide 218, and the recording surface which is not sufficiently dried after ink jet recording, are not affected. The above-described roller 222 and the driving roller 223 are included in the sheet feeding portion, and the sheet is discharged in the arrow B2 direction after recording on the recording sheet S fed in the arrow B1 direction.

At this time, as will be described later, the print information on the recording paper is read by the sensor 240, which is a reflection type sensor, and it is checked whether the black information is normally printed.
The presence / absence of ink in the ink cartridge 212 is detected.

Here, the roller 222 and the sensor 240
Is a lid 22 that is rotatable and openable with respect to the main body 201.
The ink cartridge 212 is rotatably provided at the edge of the printer 6, so that the ink cartridge 212 can be easily replaced after the lid 226 is opened, and a jammed recording sheet can be easily removed.

Further, a driven roller 219 is further provided in a pressed state on the outer peripheral surface of the rubber roller 217 described above, and one sheet fed in the direction of arrow D in the drawing is inserted from the opening 229. The sheet is guided along the sheet guide 218 and sent to the platen 215 to enable recording.

Next, a plurality of recording sheets S are stacked and accommodated in the sheet holder 206, and one sheet is formed by the separation feed roller 220 which is a sheet separating mechanism and the feed roller 221 provided with the pressure contact roller 221a. It is configured so that it is sent out between the press contact piece 216 and the rubber roller 217 for each.

The feed roller 221 causes the recording paper S to be bent and deformed by an angle θ, but since it is considerably smaller than 180 degrees for a half circumference as in the conventional case, the recording paper S is less affected.

In the facsimile apparatus described above, the document E is sent out in the direction of arrow A at the time of transmission to be transmitted. When receiving, another drive of the separation feed roller 220 is performed to feed one sheet of recording paper between the guide portion 218a of the sheet guide 218 and the feed roller 221, and then between the pressure contact roller 221a and the feed roller 221. After sandwiching, it is sent out between the pressure contact piece 216 and the rubber roller 217. Reference numeral 250 denotes a recording paper sensor for detecting the leading edge and the trailing edge of the recording paper.
It is used to detect conveyance defects.

After that, the sheet is conveyed stepwise in the direction of the arrow B2, and a predetermined dot (360 dp in this example).
Recording for one line for 64 dots) at the resolution of i) is repeatedly performed, and after the recording for one recording sheet is completed, the sheet is discharged from the discharge port 207 to the outside.

FIG. 3 is a block diagram showing the configuration of the main part of the facsimile apparatus shown in FIGS. 1 has a recording resolution of 360 dp in the main scanning direction for recording on recording paper.
i, an inkjet recording device section using an inkjet recording head of 360 dpi in the sub-scanning direction, 2 is a resolution conversion circuit for converting the resolution of 8 pels in the main scanning direction of the facsimile to 360 dpi which is the recording resolution of the recording device section 1 in the main scanning direction, 3 Has a resolution of 360 dpi and a main scanning direction of 6
A horizontal-to-vertical conversion circuit for outputting 4-line data (hereinafter referred to as block data) in 8-bit units from the first pixel of the first line in the sub-scanning direction, and 4 is a facsimile-received MH or MR.
A reception buffer 4a for temporarily storing the encoded image data, a reception memory 4b having a capacity for storing several pages received by facsimile with the MR encoded image data, and a resolution of 8 pels in the main scanning direction 1 A line buffer 4c and 360 having a capacity for storing raw data for lines
A memory including a block buffer 4d having a capacity of storing raw data for 64 lines in the main scanning direction at a resolution of dpi,
Reference numeral 5 is a code decoding unit including a decoding unit 5a having a function of detecting error lines by decoding image data encoded in MH and MR, and an encoding unit 5b encoding raw data into MH or MR, and is a logic circuit. It is composed by. 6 is M
ODEM, 7 is a transmission original or copy original 8p in the main scanning direction
el, sub-scanning direction 3.851 / mm or 7.71 / m
A reading unit that reads at a resolution of m, 8 is a counter that counts the number of clocks of an input signal, 9 is a centro transmission circuit that transmits 8-bit parallel data that complies with the Centronics interface, and 10 is 4
Output port A having 11 ports, input port A having 5 ports, 12 is the above constituent elements 2 to 1
Monitor and control up to 1, interrupt control and D
A microprocessor CPUA having a built-in MA transfer function and capable of program processing for MR decoding. An 8-bit data bus connected from the CPU A12 to each component is not shown.

Next, the structure of the ink jet recording apparatus section 1 will be described. 101 is a Centro receiving circuit that receives 8-bit parallel data conforming to the Centronics interface, and 102 is a recording density of 360 dpi in the sub-scanning direction, and has 64 dot rows of nozzles, and causes the ink to change state by using thermal energy. A recording head of an ink jet recording system that ejects ink to record an image on a recording paper, 103 is a memory for storing block data, and the recording head 102 corresponds to the data of this memory.
The recording control unit 104 includes a driver that controls the heat of each nozzle, and 104 is a recording head conveyance that conveys the recording head 102 in the main scanning direction with a feed accuracy of 360 dpi steps in synchronization with the timing of the ink ejection control of the recording control unit 103. Reference numeral 105 denotes a recording paper feeding / discharging / recording head 102.
36 for determining the position in the sub-scanning direction when recording with
Recording paper transport unit having a feeding accuracy of 0 dpi step, 1
Reference numeral 06 denotes a recording sheet sensor (corresponding to 250 in FIG. 2) for detecting the presence / absence of the recording sheet and the leading edge and the trailing edge of the recording sheet.
Reference numeral 07 is a reflection type photo sensor (corresponding to 240 in FIG. 2) for detecting the density of the recording surface on recording, 108 is an input port B having four ports, 109 is an output port B having three ports 110 Is the above components 101 to 10
This is a microprocessor CPUB for monitoring and controlling 5, 108, and 109. An 8-bit data bus connected from the CPU B110 to each component is not shown.

Next, the interrupt signal input to the CPU A12 will be described. Reference numeral 21 is an interrupt signal MODEI for notifying that the MODEM 6 has finished transmitting the previous transmission data at the time of transmission and the next transmission data is ready for input, and that the reception data is ready for output with 8 bits aligned at reception. An interrupt signal S indicating that the read data of the section 7 is ready for output.
HI, 23 is an interrupt signal ENDI indicating that the decoding unit 5a has finished decoding one line of image data and has detected a line error, and 24 is an image for the resolution conversion circuit 2 for one line in the main scanning direction. Interrupt signal RCN to notify the end of data resolution conversion
I and 25 are interrupt signals HCNI indicating that the horizontal / vertical conversion circuit 3 meets the centro transmission circuit 9 to end the horizontal / vertical conversion of one block of image data and the next block data can be input. Is.

Next, the transfer direction of the DMA transfer by the 8-bit bus of the CPU A12 will be described. Reference numeral 31 is a DMA # 0 that transfers the MH or MR coded data stored in the reception buffer 4a to the decoding unit 5a, and 32 is a DMA # 1 that transfers the data coded by the coding unit 5b to the reception memory 4b. , 33 are DMA # 2 for transferring the data of one block whose resolution is converted by the resolution conversion circuit 2 to the block buffer 4d.

Centro transmitter circuit 9 and centro receiver circuit 1
As for the centro signal during 01, 9a is 8
The bit parallel data signal lines PD0-7 and 9b form the data strobe signal PSTB and 101a that form the timing of fetching the signal line 9a. The status signal B that informs the centro transmission circuit 9 of the state in which data cannot be received.
USY, the data of the signal lines PD0 to PD7 while the data strobe signal PSTB is at the low level is taken in.
The timing of these signals is shown in FIG. By using such a control signal, the CPU A12 can control the recording device unit 1 in the same way as a personal computer controls a printer.

Next, from the output port A10 to the input port B
The signals connected to 108 will be described. These signals are signals for controlling the recording device unit 1 by the CPU A12. The control signal POWS 10a for turning on / off the recording device unit 1 controls the high level, the low level, and the high level (hereinafter referred to as low pulse), and this state (on state) can be selected by alternation. POWS1 in ON state
When 0a is set to a low pulse, the recording device unit 1 immediately moves the recording head 102 to the home position by the recording head transport unit 104, stops all the operations, and turns off. In the off state, the recording device unit 1 monitors only the low level signal of the POWS 10a, so that other signals 10b-d described below and the centro signals 9a and 9b described above are ignored. Reference numeral 10b is a control signal ONLS for setting the recording device unit 1 to an offline / online state, and one low pulse is alternate, and this state (online state) can be selected. In the online state, the centro receiving circuit 101 becomes operable. The signals 10a and 10b are turned on by turning on the power.
Goes high and the online state is set. 1
Reference numeral 0c is a control signal LFDS for line-feeding the recording paper in the sub-scanning direction with a low pulse of 1 second or less and performing form feed with a low pulse of 1 second or more in the off-line state. Reference numeral 10d is a signal PPAP corresponding to the presence or absence of the recording paper at the position of the recording paper sensor 106, which is at a low level and the recording paper sensor 106 is in the ON state (the recording paper is at the sensor position).
At a high level, the signal is a signal for causing the recording device unit 1 to perform an operation corresponding to the OFF state of the recording paper sensor 106 (the state where the recording paper is not at the sensor position).

Next, from the output port B109 to the input port A
The status signal for displaying the state of the recording device unit 1 connected to the recording unit 11 will be described. A signal POW 109a indicates an on state at a high level and an off state at a low level.
L and 109b are a signal ONLL which indicates an online state at a high level and an offline state at a low level, and 109c is a signal ERRL which indicates an error state at a high level and a normal state at a Lore level.

From recording paper sensor 106 to input port A11
The signal line 106a connected to is at a low level and the recording paper sensor 106 is in the ON state (the recording paper is at the sensor position), and at a high level, the recording paper sensor 106 is in the OFF state (the recording paper is not at the sensor position). ) Is a status signal PAP.

FIG. 13 shows the state of the recording device unit 1 represented by the signal lines 109a-c and 106a. This makes the CPU
A12 can know what state the recording device unit 1 is in. ST1 is an OFF state, ST2 is an offline state, ST3 is an online state indicating a recordable state, S
T4 is a recording paper jam error state when the recording paper is not ejected within a predetermined time because the recording paper jams in the recording paper conveyance system or a recording paper having a length of a predetermined length or more is set, S
T5 is a home position error state when the print head 102 cannot be moved even if the print head 102 is moved to the home position, and ST6 is a memory error when a defect is detected by checking the ROM and RAM of the CPUB 110 and the RAM of the recording control unit 103. It represents. At the time of ST4, the CPUA 12 causes the display unit 202b to display “record paper jam”.
A message is displayed to prompt the operator to remove the recording paper from the recording paper conveyance system. At this time, the operation unit 202 operated by the operator
When the stop key of is pressed, the CPUA 12
Form feed is performed by the roll pulse of the FDS 10c for 1 second or more, and the recording paper is discharged. In ST5 and ST6, the CPUA 12 displays "printer error" on the display unit 202b, and the operator is informed of the unrecordable state to prompt the recovery operation. When the stop key of the operation unit 202 is pressed, the CPUA 12 causes the POWS 10a
Is set to a low pulse to bring it to the state of ST1 and then roll-pass again to bring it to the state of ST2. If ST5 or ST6 occurs again here, the "printer error" is continuously displayed to indicate that the recording device unit 1 cannot recover from the error state.

The signal line 107c connected from the photo sensor 107 to the input port A11 is at a high level when the photo sensor 107 detects a predetermined density or less (white) and at a low level a predetermined density or more (black). This is a status signal to represent.

A signal 110a connected from the CPU B110 to the counter 8 is a clock signal PFCLK for counting how many steps the recording paper conveyance unit 105 has conveyed the recording paper in the sub-scanning direction. FIG. 8 shows a circuit diagram of this detail.

Reference numeral 105a is a motor driver, and 105b is a recording paper conveyance motor. The control signal for the motor phase excitation of the CPU B110 is PFCLK110a by the logic shown in the figure.
Is making. Therefore, in 2 steps of recording paper conveyance, PF
One clock is generated for CLK. By reading the value of the counter 8, the CPU A 12 can know how many steps the recording conveyance unit 105 has conveyed the recording paper.

Next, the operating principle of the resolution conversion circuit 2 will be described.

First, the ratio of the resolution of the read or received image to the resolution of the recording is as follows. Main scanning direction 8 pel / 360 dpi = 0.564 Sub scanning direction 7.71ine / mm / 360 dpi =
0.543

As described above, in a facsimile apparatus having different reading and recording resolutions or having a recording density different from the resolution of facsimile communication, it is necessary to record at the same size as the original at the time of reception or copying, so A resolution conversion circuit is required. Original data 9b in the main scanning direction
It is 16 bits, and 6 bits is 11 b in the sub-scanning direction.
When expanded to it, it becomes 0.564 × (16/9) = 1.003 in the main scanning direction and 0.543 × (11/6) = 0.996 in the sub-scanning direction, and recording can be performed at approximately the same size.

FIG. 7 is a diagram schematically showing the concept of resolution conversion when copying and recording a read image and receiving and recording a received image. Here, reference numeral 50a indicates resolution conversion in the main scanning direction, and the read pixel 51a is divided into two recording pixels 51a ', and 53a is divided into one recording pixel 5a.
By substituting 3a ', it becomes possible to perform equal-size recording in the main scanning direction. The resolution conversion circuit 2 performs resolution conversion in the main scanning direction and is realized by a simple latch circuit.

Reference numeral 50b indicates resolution conversion in the sub-scanning direction, and one line 51b of the read pixel is replaced by 51b 'for two lines of the recording pixel, and 53b' for one line of the recording pixel like 53b. It becomes possible to record at the same size in the scanning direction. In the sub-scanning direction, the CPU A12 controls the writing twice on the same line by software control.

[Reception Operation] Next, the operation of facsimile reception will be described.

When receiving 1-byte data in MODEM 6 during facsimile reception, the MODEA 21 interrupts the CPU A 12 and writes the data in MODEM 6 to the reception buffer 4a. When a predetermined amount of data is written in the reception buffer 4a, the CPU A12 causes the decoding unit 5
The data is transferred to a by DMA # 0, and when the transfer is completed, it waits until a predetermined amount of data in the reception buffer 4a is written and repeats this. When the decoding unit 5a finishes decoding one line, the ENDI-23 interrupts the decoding, and the decoding unit 5a
Normal lines and lines in which a transmission error has occurred are counted from the result of a. When the reception of one page is completed, the ratio between the error line and the total line is calculated, and if the ratio is a certain value or more, it is determined that there is an abnormality in the reception and RTP or RTN is returned to the Q command. If it is less than a certain value, MCF is returned to the Q command. The line data normally decoded by the decoding unit 5a is coded by the MR unit by the coding unit 5b, transferred to the reception memory 4b by the DMA # 1, and managed by the CPU A12 page by page. Since the encoding / decoding unit 5 is composed of hard logic, it is processed at extremely high speed, and the processing content that must be processed immediately is interrupted by a main program. Further, by performing only the above processing, the proxy reception by the memory can be performed in a state where the recording device unit 1 cannot record due to the absence of recording paper or ink.

The code data of the receiving memory 4b is set to the CPUA1.
By the MR decoding processing by the software processing of 2, the raw data of one line is developed and written in the line buffer 4c. When this 1-line raw data is written in the resolution conversion circuit 2, the resolution-converted image data is transferred to the block buffer 4 in the DMA # 2.
forwarded to d. When the transfer is completed, RCNI notifies CPUA 12 by an interrupt. While repeating this and the resolution conversion in the sub-scanning direction by the CPU A12, 64 lines of data are stored in the block buffer 4d.
When the block data is written in, the block data is written in the horizontal / vertical conversion circuit 3. When the data for one block is written, the horizontal / vertical conversion circuit 3 automatically transfers the converted data to the centro transmission circuit 9, and the centro transmission circuit 9 starts to transfer to the centro reception circuit 101. When one block of data has been transferred to the recording device unit 1 as centro data, HCN
I25 notifies CPUA12 by an interrupt.

As described above, the completion of the processing of the components other than the CPU A12 can be known by the interrupt, and the data transfer is performed by the DMA as much as possible, so that the CPU A12 can perform the facsimile communication protocol and the soft decoding processing in the main program. I can concentrate on it.

[Recording Operation] The recording operation of the recording device section 1 will be described.

FIG. 4 is an enlarged view of the main part of the recording device section 1 showing the arrangement of the respective constituent elements, and 111 is a recording sheet. A black member is used at the detection position 107a so that the reflected light of the photosensor 107 disappears when the recording paper 111 is not present at the detection position 107a of the photosensor 107. FIG. 11 shows a circuit for binarizing the output of the photo sensor 107. By appropriately setting the reference voltage 107b, the detection output 107c can be determined according to the magnitude of the reflected light at the detection position 107a. As in the case where the white background of the recording paper S is detected, when the detection position 107a is below a predetermined density, the reflected light becomes large,
The detection output 107c becomes a high level (white level). Since the reflected light becomes small when a portion recorded on the recording paper 111 by the recording head 102 is detected or when the recording paper S has a predetermined density or more, such as when there is no recording paper S, the detection output 107c is at a low level ( Black level).

FIG. 5 shows the recording paper sensor 106 and the photo sensor 1.
112 shows the positional relationship of 07 with respect to the recording paper.
Is a footer mark and its recording position for detecting the remaining ink amount, which will be described later. Here, the recording paper sensor 106,
The photo sensor 107 and the mark 112 are arranged so as to be aligned on a straight line. Further, these are arranged at the left end of the recordable range of the recording head 102 with respect to the recording paper 111. Further, the footer mark recording position is set to a position such that a recording paper white background of a predetermined length always remains at the trailing edge of the recording paper 111.

Next, the control for recording the facsimile received image received by the centro receiving circuit 101 will be described with reference to the flowchart of FIG.

First, the CPUA 12 sets the number of lines (2 Lb) so that the recording paper sensor 106 is in the ON state at the time when the recording is completed, that is, the trailing edge of the recording paper does not pass the sensor 106. The transfer of image data is started (S1). It should be noted that the image data is the centro receiving circuit 101.
When a predetermined amount is stored in the buffer 103a in the recording control unit 103 via the CPU, the CPUB 110 causes the recording head transport unit 104 to move the recording head 102 from the home position to the idle ejection position, thereby clogging the nozzles and In order to remove the thickened ink, ink droplets are ejected from all nozzles, that is, so-called blank ejection is performed a predetermined number of times (for example, 50 times). After the end of this recovery processing, the CPUB 110 causes the recording control unit 10
3, the recording head transport unit 104 and the recording paper transport unit 105 are controlled to start the recording operation of the image data stored in the buffer 103a from the centro receiving circuit 101 onto the recording paper 111. When the leading edge of the recording paper 111 reaches the recording paper sensor 106, the sensor 106 is turned on (S2). At this time, when the CPU A12 sets the signal 10d to the low level (S3), the CPU B110 moves the recording paper 111 to the recording position of the recording head 102 by conveying a predetermined number of lines (2 La) from there. Then the image recording is started. At this time, the CPU A12 waits until the count Lb of the counter 8 indicating that the recording of the number of transferred lines is completed (S
4). Next, the counter 8 is reset, 1 block data (64 lines) is transferred, and block data recording is repeated while monitoring the recording paper sensor 106 (S
5). The counter value (Lc) of the counter 8 when the recording paper sensor 106 is turned off is read (S
6). The data for the number of lines 2Le is transferred and the end of recording is awaited (S7). Thus, the recording of the image data on the recording paper 111 is completed. Here, 2Le is represented by 2Le = 2Lc + 2Ld− (64 × 2 + 2Lf), where 2Ld between the recording paper sensor 106 and the head nozzle of the recording head 102 and 2Lf as the margin at the trailing end of the recording paper. FIG. 8 explains this calculation formula in an easy-to-understand manner.

Further, during the image data recording operation, the CPUB1
10 is the recording head 2 at regular intervals (for example, 12 seconds)
12 is moved to the idle discharge position and all nozzles are made to perform the idle discharge operation a predetermined number of times (for example, 50 times) to prevent the occurrence of defective discharge.

Further, such an idle discharge operation is also performed in response to power-on.

Instead of such an idle discharge operation, a recovery operation may be performed by performing a suction operation with a pump or the like while the recording head is capped.

Next, a method of determining whether recording has been normally performed will be described.

In order to record the footer mark at the position 112 on the recording paper 111 by the recording head 102, the image data of the footer mark is transferred (S8). In this embodiment, the length of 64 nozzles of the recording head 102 is about 4.5 mm.
The footer mark is the all-black square. The state of the detection output 107c of the photo sensor 107 at this time is stored (S9). Next, the trailing edge of the recording paper 111 is at the detection position 10
A feed command having a sufficient number of steps for discharging the recording paper from the recording paper conveying system after passing 7a is issued to the recording device unit 1 (S1).
0), only when the state of the detection output 107c is changed, the state is stored in the RAM in the CPU A12, and it is confirmed that the paper discharge is completed by the counter value of the counter 8 (S11). The signal 10d is set to high level (S12),
It is determined whether or not the recording is normally performed according to the stored change pattern of the detection output 107c (S13).

If the leading edge of the recording sheet cannot be detected within S2 (S14) or the trailing edge of the recording sheet cannot be detected within S5 (S16), a recording sheet jam occurs. The determination is made, the recording operation is stopped, and the jam processing described above is performed. If the trailing edge is detected before the count value of the counter 8 reaches Lb in S5, it is considered that a recording paper shorter than the specified recording paper length has been set (S15), a recording paper size error occurs, and the recording operation is stopped. To do. Alternatively, the signal 10d is immediately set to the high level and the process is repeated from S2 to divide the recording into two or more sheets for recording.

FIG. 12 shows the correspondence between the change pattern of the detection output 107c (7 patterns P1 to P7) and the judgment of the recording operation. P1 detects the white background of the recording paper 111 in S11, and then detects the black footer mark, the white background of the trailing edge, and the recording paper 111.
This is a case where the detection position 107a after the paper discharge is detected. P2
Detects the portion recorded on the recording paper 111 by the recording head 102 in S11, and then passes through the black footer mark, the trailing edge white background, the detection position 107a after the recording paper 111 is discharged.
This is the case when is detected. P3 is a case where the detection position 107a after discharging the last recording paper 111 of the pattern P1 is not detected. P4 is a case where the detection position 107a after discharging the last recording paper 111 of the pattern P2 is not detected. In P5, the white background of the recording paper 111 is detected in S11, and the trailing edge white background and the detection position 107a after the recording paper 111 is discharged.
This is the case when is detected. P6 is the recording paper 111 in S11.
This is a case where the white background of No. 2 is detected and the white background of the recording paper 111 is continuously detected thereafter. P7 is a case where the black level is continuously detected.

In the case of P1 and P2, it is judged that the recording is normally completed and the recording paper 111 is also normally ejected. P3 and P
In the case of 4, it is determined that the recording is normally completed but the recording paper 111 is not normally discharged. In the case of P5, since the footer mark could not be detected, the recording head 102
It is determined that the recording paper 111 has been normally ejected because the recording is not normally performed due to the ink being exhausted or the nozzle being clogged. In the case of P6, similarly to P5, the recording is not normally performed, and it is determined that the recording paper 111 is not normally ejected. In P7, it is determined that the recording paper conveying unit 105 has a defective conveyance of the recording paper 111 while the recorded black is detected, or that a paper having a high density such as black is used as the recording paper.

Since P1, P2, P3 and P4 are normally recorded, the corresponding image data stored in the reception buffer 4c is released page by page and used as an area where the next reception data can be stored.

In the case of P3 and P4, the user is informed that the recording paper is not conveyed properly, for example, by issuing a predetermined intermittent tone from a speaker or the like in the facsimile apparatus to prompt the user to cancel the recording paper jam.

In the case of P5, P6, and P7, the CPU A12 does not erase the received image data stored in the receiving memory 4b, but issues a recording abnormality, for example, from a speaker or the like in the facsimile apparatus with a predetermined intermittent tone. As a result, after the user has been informed of the recovery operation and the BJ head has been replaced, reception recording is performed again by a predetermined operation procedure so that recording can be completed reliably. still,
In the case of P5, P6, and P7, if there is data sent after the occurrence of an abnormality, this image data is also stored in the reception memory 4b.

It should be noted that the footer mark recording described above is performed only when the received image is recorded, and is not performed when the reports such as the copy mode and the communication management report are recorded.
It is controlled by 12. This is because the user wants to record the copy and report consciously at the spot, so if an abnormal recording is made, it can be left to the user's judgment, so the facsimile machine automatically This is because there is no need to judge.

Further, it is judged that it is better to record only the image information of the read document as much as possible even if it is a footer mark in the copy.

When recording on cut paper, the received image information of one page may not be recorded on one cut paper. In this case, there is a known method of divided recording, but even in the case of divided recording, the footer mark is always controlled to be recorded at a predetermined position at the trailing edge of each cut sheet.

(Other Embodiment) Another embodiment of the judgment of the recording operation will be described. For example, if the sensor 106 cannot detect the rear end of the recording paper 111 even after the sensor 106 detects the front end of the recording paper 111 and the recording paper conveyance unit 105 conveys a predetermined number of steps, a recording paper jam or the like occurs. It can be determined that a conveyance failure has occurred or that a recording sheet having a length equal to or greater than a predetermined length has been set, and an abnormal state can be detected before the footer mark is recorded (S14 and S16). At this time, for example, a predetermined intermittent tone is issued from a speaker or the like in the facsimile apparatus to notify the user and prompt the user to remove the abnormal condition. Therefore, the fact that the control has proceeded to S8 for recording the footer mark does not pose any problem even if it is assumed that the recording paper is also discharged normally. Therefore, it is not necessary to compare up to 12 P1 and P2 patterns.
4 is enough.

Next, another example of the method for determining whether or not the recording device unit 1 has finished recording the data transferred by the Centro interface will be described. In S4, S7, and S11 of FIG. 6, the judgment is made by the counter value of the counter 8, but the judgment can be made by the fact that the counter value does not change for a predetermined time or longer. In particular, when the phase excitation control signal of the CPUB 110 in FIG. 10 has an extra pulse for a short time that does not cause the motor to rotate, noise is generated at the counter input 110a and an accurate number of conveyance steps cannot be counted. Is valid.

FIG. 14 shows another example of the footer mark. 112 is the above-mentioned footer mark, but at the position of 113 on the same line as 112, "FAX RECEPTION"
It is additionally recorded with a message or an illustration for notifying the user of the reception time of the facsimile reception recording paper such as 10:21 ". By this, the facsimile reception recording paper can be positively appealed. However, the message at position 113 is 114
No resolution conversion is applied to the position of 113 in order to clearly distinguish it from the facsimile image information of
If it is recorded in the pi font, the resolution is considerably different from the resolution of the 114 image, so that it can be easily distinguished. For this purpose CP
It is possible if the footer data is transferred from the UA 12 to the centro transmission circuit 9 via the data bus. The font and message to be recorded at the position 113 can be created by the CPUA 12.

Further, as another method for changing the resolution, 113
There is also a method of thinning the recording at the position every 1 dot to change the apparent density from 114 facsimile image information. This thinning-out recording is a technique known as "draft mode" and "economy mode" in the field of printer devices, and can be easily realized by a command via the Centro interface.

Further, since the message to be recorded at the position of 113 can be created by the CPU A12, it is possible to easily add the data such as the number of received pages and the reception time, which is advantageous in the facsimile reception.

In the above embodiment, the cut paper is used as the recording paper, but the same can be applied to the roll paper. However, by recording the footer mark on the line next to the end of one page of the received image information, it is possible to eliminate waste of recording paper.

Further, since a recording apparatus using an ink jet generally has high resolution, it can be used as a printer for a personal computer or the like. Therefore, a facsimile machine having a printer interface can be considered. Figure 15
3 is a block diagram of a main part, showing a block part added to the paths of the centro transmitting circuit 9 and the centro receiving circuit 101 of FIG. Reference numeral 114 is a printer interface connector (generally a Centronics interface) for connecting a personal computer, and 115 is a switching circuit controlled by the CPU 12 to route the signal lines 9a and 9b. The user can select a facsimile or printer mode by pressing a mode selection button (not shown) on the operation unit 202. When used as a facsimile, the switching circuit 11 is operated by the CPU A12.
By connecting 5 to 9 side, the above-mentioned facsimile operation becomes possible. When using as a printer, CP
By connecting the switching circuit 115 to the 114 side by the UA 12, the printer can be operated by the control of the personal computer connected to the connector 114. Since it complies with the Centronics interface, such simple switching is possible.

With such a configuration, the footer mark is not recorded in the printer mode.

Further, since the block buffer 4d is a memory required for performing vertical / horizontal conversion, the block buffer 4d is not necessary in the recording device unit 1 capable of transferring image data that does not require vertical / horizontal conversion. 4d may be a line buffer having a small capacity, or a circuit configuration may be adopted in which data is directly transferred from the resolution conversion circuit 2 to the centro transmission circuit 9.

As described above, the decoding unit 5a, which operates preferentially, responds to the Q command by decoding the received data and counting the error lines, and the received data with the error lines deleted is controlled by the control means. CPU A1
By decoding and recording by the software processing of No. 2, when the inkjet method is used as a recording apparatus of a facsimile apparatus, a reliable response to a Q command and a system capable of recording while receiving are realized at low cost. be able to.

In this embodiment, the recording apparatus of the ink jet recording method, in which the flying droplets are formed by utilizing the thermal energy among the ink jet recording methods to perform recording, has been described as an example. Regarding the configuration and the principle, it is preferable to use the basic principle disclosed in, for example, US Pat. Nos. 4,723,129 and 4,740,796. This method can be applied to both the so-called on-demand type and the continuous type. In particular, in the case of the on-demand type, it is arranged corresponding to the sheet or liquid path holding the liquid (ink). By applying at least one drive signal which gives a rapid temperature rise exceeding each boiling corresponding to the recording information to the electrothermal converter, heat energy of the electrothermal converter is generated, and the heat of the recording head is heated. This is effective because film boiling is caused on the working surface, and as a result, bubbles can be formed in the liquid (ink) that correspond one-to-one to this drive signal. Liquid (ink) is ejected from the ejection openings by the growth and contraction of the bubbles to form at least one droplet. It is more preferable to make this drive signal into a pulse shape because bubbles can be immediately and appropriately grown and contracted, so that liquid (ink) ejection with excellent responsiveness can be achieved.

As the pulse-shaped drive signal, those described in US Pat. Nos. 4,463,359 and 4,345,262 are suitable. still,
US Patent No. 4 of the invention relating to the rate of temperature rise of the heat acting surface
If the conditions described in the specification of No. 313124 are adopted, more excellent recording can be performed.

As the constitution of the recording head, in addition to the combination constitution of the discharge port, the liquid passage, and the electrothermal converter (the straight liquid passage or the right-angled liquid passage) as disclosed in the above-mentioned specifications, U.S. Pat. No. 4,558,333, US Pat. No. 4,558,333, which discloses a configuration in which the thermal action is arranged in the region of flexion.
A configuration using the specification of No. 459600 may be used.

In addition, JP-A-59-123670 discloses a structure in which a common slot is used as a discharge portion of the electrothermal converter for a plurality of electrothermal converters, and a pressure wave of thermal energy is absorbed. A configuration based on Japanese Patent Application Laid-Open No. 59-138461, which discloses a configuration in which an opening corresponds to a discharge portion, may be adopted.

Further, as a full line type recording head having a length corresponding to the width of the maximum recording medium which can be recorded by the recording device, the length can be increased by combining a plurality of recording heads as disclosed in the above-mentioned specification. Either of the structure satisfying the requirement or the structure as one recording head integrally formed may be used.

In addition, by being mounted on the apparatus main body, it can be electrically connected to the apparatus main body and can be supplied with ink from the apparatus main body by a replaceable chip type recording head or the recording head itself. The present invention is also effective when a cartridge type recording head provided with an ink tank is used.

Further, it is preferable to add recovery means, preliminary auxiliary means, etc. to the recording head because the effects of the present invention can be further stabilized. Specific examples thereof include capping means, cleaning means, pressurizing or suctioning means for the recording head, an electrothermal converter or a heating element or a preheating means using a combination thereof, and recording separately. It is also effective to perform the stable recording by performing the preliminary discharge mode for discharging.

In the embodiments of the present invention described above, the ink is described as a liquid, but it is an ink that solidifies at room temperature or lower and softens at room temperature, or is a liquid, or the above-mentioned. In the inkjet recording method, the temperature of the ink itself is generally adjusted within the range of 30 ° C. or higher and 70 ° C. or lower to control the temperature of the ink so that the viscosity of the ink is within a stable ejection range. Any liquid may be used as long as the ink is liquid.

In addition, the temperature rise due to the thermal energy is positively prevented by using it as the energy for changing the state of the ink from the solid state to the liquid state, or the ink is solidified in a standing state for the purpose of preventing evaporation of the ink. In some cases, such as ink that is liquefied by applying heat energy according to a recording signal and ejected as a liquid ink, or one that has already started to solidify when it reaches a recording medium. It is also possible to use an ink that has the property of being liquefied only by heat energy. In such a case, the ink is kept in a liquid or solid state in the recesses or through holes of the porous sheet as described in JP-A-54-56847 or JP-A-60-71260. Alternatively, it may be configured to oppose the electrothermal converter. The most effective method for each of the above-mentioned inks is to execute the above-mentioned film boiling method.

Further, the present invention is not limited to the ink jet method using heat energy, but can be applied to the ink jet method using a piezo element or the like.

[0086]

As described above, according to the present invention, the control means for controlling the operation of the decoding means for performing the decoding processing for the transmission error check performs the decoding processing for generating the recording data and the decoding processing. Since the decoding and transmission error detection processing by the means and the decoding processing for generating the recording data are performed in parallel and in parallel, the image communication apparatus that surely responds to the θ command and records while receiving is low cost. Can be realized in.

[Brief description of drawings]

FIG. 1 is an external perspective view of a facsimile apparatus to which the present invention is applied.

FIG. 2 is a sectional view of the facsimile device shown in FIG.

FIG. 3 is a block diagram showing a configuration of a main part of a facsimile apparatus according to an embodiment of the present invention.

FIG. 4 is a layout view of components of the recording device unit 1.

FIG. 5 is a diagram showing a relationship between a recording paper sensor, a photo sensor, and a footer mark recording position.

FIG. 6 is a flow chart of facsimile reception recording and determination of whether recording is normally performed.

FIG. 7 is a conceptual diagram of resolution conversion in a main scanning direction and a sub scanning direction.

FIG. 8 is a diagram showing a relationship among a recording paper sensor, a recording head, and a footer mark recording position.

FIG. 9 is a signal timing diagram of the Centronics interface.

FIG. 10 is a circuit diagram for counting the number of feeding steps of recording paper conveyance.

FIG. 11 is a circuit diagram for binarizing the output of the photo sensor.

FIG. 12 is a diagram showing the correspondence between the change pattern of the photo sensor output 107c and the judgment of the recording operation.

FIG. 13 is a diagram showing a state of the recording device unit 1.

FIG. 14 is a diagram showing another example of footer mark recording.

FIG. 15 is a block diagram of a portion added to a facsimile device having a printer interface.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Recording device section 2 Resolution conversion circuit 3 Horizontal-vertical conversion circuit 4 Memory section 5 Code decoding section 6 MODEM 8 Counter 9 Centro transmission circuit 12 CPUA 101 Centro reception circuit 102 Recording head 106 Recording paper sensor 107 Photo sensor 110 CPUB

Claims (6)

[Claims] 1. Receiving means for receiving encoded data, and decoding means for performing decoding processing on the encoded data received by the receiving means, and performing transmission error detection processing for each line based on the decoded data. A control unit that controls the operation of the decoding unit and performs a decoding process of the encoded data excluding the encoded data of the line in which the transmission error has occurred in order to generate the recording data; A recording means for recording an image on a recording material based on the data, and the decoding means performs the decoding processing and the transmission error detection processing by the decoding means, and the decoding processing by the control means in parallel, and the control means is the decoding means. The image communication device, wherein the operation of (1) is executed prior to the decoding process for generating the recording data. 2. The image communication apparatus according to claim 1, wherein the decoding means performs the decoding processing by a dedicated logic circuit, and the control means performs the decoding processing by software processing of a microprocessor. 3. The image communication apparatus according to claim 2, wherein the count processing of the line in which the transmission error has occurred is executed by an interrupt processing of the microprocessor. 4. The recording means records an image by moving a recording head having a plurality of recording elements relative to a recording material in a direction different from the arrangement direction of the plurality of recording elements. The image communication device according to claim 1. 5. The image communication apparatus according to claim 4, wherein the recording head records an image on a recording material by ejecting ink droplets according to received data. 6. The image communication apparatus according to claim 5, wherein the recording head ejects an ink droplet by causing a state change in the ink by using thermal energy.